Abstract : Gas adsorption is widely used for characterization of clays. Apart from “classical” experiment of nitrogen or
other gases adsorption/desorption at cryogenic temperatures, allowing the determination of the specific surface
area, partial mesopore and micropore volume and size distributions, gas adsorption can also be used for the
characterization of clay surface texture (energetic heterogeneity) related to layered structure of clays. Derivative
Isotherm Summation applied to high-resolution gas adsorption isotherms was shown to be a powerful tool to
access energetic characteristics and ratio between basal and lateral faces of clay particles. To date, the method is
not commonly employed for characterization of clays and other heterogeneous solids, probably due to specificity
of high-resolution isotherms acquisition technique described in the original literature: quasi-equilibrium volumetry with gas injection by microleak. We illustrated in the present work a possibility to use widely available
static manometric commercial gas adsorption analysers for this purpose
